Linear Technology Korea announced the release of the LTM4642, a compact 9mm x 11.25mm x 4.92mm BGA package with dual 4A or single 8A step-down µModule.

This device operates over a wide input voltage range of 2.375V to 20V and provides two adjustable output voltages of 0.6V to 5.5V. Each output is a synchronous buck converter operating with high efficiency. With a 12V input and outputs of 1.8V, 5V, and 3.3V, the efficiencies under maximum load conditions are 88%, 91%, and 93%, respectively.



Two 4A outputs provide precise voltage regulation of ±1.5% across the entire line and load variations, and can be configured into a single 8A output where the current of the two channels is shared. It also guarantees operation in the range of –40°C to 125°C.

With the LTM4642's small footprint, high efficiency, and dual regulator design, system designers can reduce PCB area or design point-of-load (PoL) regulators to fit snugly into the crowded space of high-density boards. The LTM4642 can be used in applications such as industrial, robotic, medical, instrumentation, and telecom systems.

The LTM4642 can be synchronized with an externally supplied clock in a frequency range corresponding to 600 kHz to 1.4 MHz. Output ripple voltage is reduced due to the device's 180° phase-shift operation. The low package thermal impedance enables full load current at an ambient temperature of up to 95°C without airflow, and full load current at 100°C with 200 LFM when converting from 12 V to 1 V output.